The Speedometer App
That Tracks With Precision
Accurate GPS speed in MPH or km/h, a windshield HUD, speed alerts, a 0–60 timer, and automatic trip recording — all private, all on your iPhone.
Everything a speedometer app should be
Speedometer: Speed Monitor turns your iPhone into a precise speedometer, trip logger, and HUD — designed to stay out of your way while capturing every detail.
Accurate GPS speedometer
Big, glanceable speed in MPH, km/h, or knots. Switch between a clean digital readout and a classic analog needle dial.
Automatic trip recording
Trips start and stop on their own, even with the app closed. Every drive is saved with its route, distance, and time.
Trip history & stats
Review max and average speed, a speed-over-time chart, and the mapped route for every trip. Filter trips and share trip cards.
Windshield HUD
Mirrored head-up display: lay your iPhone on the dashboard at night and your speed reflects in the windshield.
Speed alerts
Set your own limit and get a vibration or voice alert when you go over it. The display turns red so you notice instantly.
0–60 timer
Time 0–30 mph, 0–60 mph, and 0–100 km/h with GPS precision, and keep your personal bests.
Drive, ride, walk, or sail
Driving, cycling, on-foot, and boating modes tune the scale and units to how you're moving. Plus a lifetime odometer.
Private by design
No account and no sign-up. Your trips and routes are stored only on your iPhone — never uploaded.
Free · No download
Free speed tools
Use them right here in your browser, on any phone.
Speedometer guides
How speed is measured, how accurate it is, and how to use it.
What Is a Speedometer? How It Works and Why It Matters
A speedometer shows how fast you're moving. Learn how mechanical, electronic, and GPS speedometers work, how they differ from odometers and tachometers, and why accuracy matters.
Read guide 6 min readHow Does a GPS Speedometer Work?
GPS speedometers measure speed from satellite signals, not your wheels. Here's how the Doppler effect makes your phone a surprisingly accurate speedometer — and when it isn't.
Read guide 5 min readGPS vs Car Speedometer: Why Your Car Reads Faster Than You're Going
Most car speedometers show a higher speed than you're actually traveling. Learn why, how big the difference usually is, and which one to trust.
Read guide 5 min readWhy Use a Speedometer App? 8 Practical Reasons
Your car already has a speedometer, so why use an app? From checking accuracy to cycling, boating, HUD displays, and trip logs, here's what a speedometer app is good for.
Read guide 4 min readHow to Check Your Speed on iPhone (4 Easy Ways)
Want to see how fast you're going on your iPhone? Here are four ways, from a free browser speedometer to a dedicated app with HUD and trip history.
Read guide 5 min readHUD Speedometer: Project Your Speed onto the Windshield with Your Phone
A head-up display (HUD) shows your speed in your line of sight. Learn how to turn your phone into a windshield HUD, how to set it up, and when it works best.
Read guideReady to Hit the Road?
Download Speedometer: Speed Monitor and start tracking your speed with precision GPS.
Download on the App StoreFor iPhone · iOS 17.0 and later